Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner, showing our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a cross-sectional view thereof taken along line 8-8 of FIG. 2.

The broken lines illustrating portions of the vacuum cleaner form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 